Expansion-reamer.



G. O. SGHELLENBAOH.

EXPANSION REAMER.

APPLIOATION FILED MAY 4, 190a.

iatenteli Aug. 3, 1909.

- hue x, 9;, lug. 2.

collars 3.

UNITED STATES CHARLES O. SCHELLENBACH, OF CINCINNATI, OHIO, ASSIGNOR TO THE SCHELLENBACH &

PATENT OFFICE.

DARLING TOOL COMPANY, OF CINCINNATI, OHIO, A CORPORATION.

EXPANSION-REAMER.

Specification of Letters Patent.

Patented Aug. 3, 1909.

To all whom it may concern:

Be it known that I, CIIARLEs'O. SennL- LENBACH, acitizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Expansion- Iieamers, of which the following is a specification.

My invention relates to an expansible reamer.

The object of the invention is to obtain a simple construction in which the cutters are evenly supported upon seats, the meeting surfaces having relative inclines whereby a slight longitudinal adjustment of the cutters on their seats provides a relatively consider, able degree of radial expansion.

The features of my invention will be more fully setforth in the description of the ac-' companying drawings, forming a part of this specification, in which Figures 1 and 2 are central vertical sections, showing the cutters in different positions of adjustment. Fig. 3 is,a section on Fig. 4 is a perspective view of one of the cutters. Fig. 5 is a central vertical section of a modification.

I re resents a sleeve having screw threaded cm s 2, provided with adjusting cellars 3.

Between the screw threaded ends of the sleeves are formed taper seats for the cutters 4. These seats have the depressions '5, 6,-

upon opposite sides ofa raised portion'7,

thus providing the inclines 8, 9. The under side of each cutter'has the counter inclines 12, 13. The ends of the cutters abutthe By adjusting the collars,jtheicutters are uniformly adjusted longitudinally I on their seats, and a very slight adjustment varies considerably the depree of radial expansion, owing to the em oyment of a plurality of abrupt inclines, and at the same time the cutters are supported at each end and evenness.

In Fig. 5, I have shown a modification useful in long reamers. To provide the middle portions of long blades with a hearing, I cut out the seats atthe middle of the sleeve and insert screws adjusted to form an intermediate support for the blades. The screws can be set to correspond with the positions of the blades given them by the adjusting collars 3.

Having described my invention, I claim 2- 1. In an expansible reamer, a body having inclined cutter seats, cutters movably mounted in said body and having inclined surfaces near their ends adapted to bear on said cutter seats, adjusting means for sai cutters, and adjustable supports for said cutters between saidcutte'r seats, substan tially as described.

2. In an expansible reamer, a body. having inclined cutter seats, cutters movably mounted in said body, having inclined suradjusting means for said cutters, and adjustable supports for said cutters between said cutter seats, substantially as described.

In testimony whereof I have hereuntoset my hand.

* CHARLES O. SCIIELLENBACH. Witnesses:- OLIVER B. KA sEa, Leo J. ODONNELL.

and are expansible with absolute uniformity faces adapted to bear on said cutter seats, 

